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juin [17]
4 years ago
13

A liquid of lower density floats above a liquid of higher density. Here is how different liquids looked when they were poured ca

refully into a beaker. What can be said about water in comparison with these liquids?
Physics
1 answer:
Anna71 [15]4 years ago
3 0

Answer:

Water is most dense.

Explanation:

Water is made up of hydrogen and oxygen atoms. Oxygen is smaller than carbon and its quite heavier, and the volume of water molecules is greater than the volume of oil molecules. It makes the water thicker than gasoline. Water molecules are therefore very attracted to one another and stack quite close around each other. This is another reason why water is denser than oil. in the same way, the water has more mass than an equal volume of alcohol and therefore it must be denser.

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A 200 g air-track glider is attached to a spring. The glider is pushed in 9.8 cm against the spring, then released. A student wi
Likurg_2 [28]

Answer:

k =  5.05 N/m

Explanation:

In order to calculate the spring mass of the system, you use the following formula:

T=2\pi \sqrt{\frac{m}{k}}     (1)

T: period of oscillation of the system

m: mass of the air-track glider = 200g = 0.200 kg

k: spring constant = ?

You first calculate the period of oscillation:

T=\frac{1}{f}=\frac{1}{12/15.0s}=1.25s

Next, you solve the equation (1) for k, and then you replace the values of the other parmateres:

k=4\pi^2 \frac{m}{T^2}\\\\k=4\pi^2 \frac{0.200kg}{(1.25s)^2}=5.05\frac{N}{m}

The spring constant of the spring is 5.05 N/m

6 0
3 years ago
A diver jumps up off a pier at an angle of 25° with an initial velocity of 3.2 m/s. How far from the pier will the diver hit the
rjkz [21]

Answer:

0.8 meters.

I just answered this ame question myself on a test I was taking.

6 0
3 years ago
Read 2 more answers
In the first-order spectrum, maxima for two different wavelengths are separated on the screen by 3.40 mm . what is the differenc
Strike441 [17]

The solution would be like this for this specific problem:

 

Given:  

diffraction grating slits = 900 slits per centimeter

interference pattern that is observed on a screen from the grating = 2.38m

maxima for two different wavelengths = 3.40mm

 

slit separation .. d = 1/900cm = 1.11^-3cm = 1.111^-5 m <span>

Whenas n = 1, maxima (grating equation) sinθ = λ/d 
Grant distance of each maxima from centre = y .. 
<span>As sinθ ≈ y/D  y/D = λ/d λ = yd / D </span>

∆λ = (λ2 - λ1) = y2.d/D - y1.d/D 
∆λ = (d/D) [y2 -y1] 

<span>∆λ = 1.111^-5m x [3.40^-3m] / 2.38m .. .. ►∆λ = 1.587^-8 m</span></span>

6 0
4 years ago
If a cannonball is fired horizontally it will not go in a straight line why?
goldfiish [28.3K]

Explanation:

A projectile (Cannon ball) is launched at an angle to the horizontal and rises up to a peak while moving horizontally. When it reaches the peak, the projectile starts to fall.

5 0
2 years ago
What is magnetism? explaination​
suter [353]

Answer:

Magnetism is the force exerted by magnets when they attract or repel each other.

6 0
3 years ago
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